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Ace, Aceca & Greyhound Forum / Re: AC Ace steering box?
« on: October 16, 2022, 09:33:41 »
Greg,
This is from the UK M.O.T testing manual (annual vehicle check though many older cars exempt)-so 75mm for a 380mm diameter wheel.
You should be able to make a quick calculator in excel for different wheel diameters or mark your wheel with tape at the 380mm dia/190mm radius.
To check steering play:
Make sure the road wheels are on the ground and pointing straight ahead.
Lightly turn the steering wheel left and right as far as possible without moving the road wheels.
Check the amount of free play at the rim of the steering wheel.
If power steering is fitted, the engine must be running.
Steering wheel free play should not be more than:
13mm for rack and pinion steering, or 48mm if there are several joints between the steering wheel and the rack
75mm for non-rack and pinion
These limits are for a standard 380mm diameter steering wheel. The limits should be adjusted up or down accordingly with larger or smaller diameter steering wheels.
Play due to wear or maladjustment must not be confused with apparent play due to the construction of the mechanism, such as caused by the deflection of flexible joints or spring compression in external power steering systems.
This is from the UK M.O.T testing manual (annual vehicle check though many older cars exempt)-so 75mm for a 380mm diameter wheel.
You should be able to make a quick calculator in excel for different wheel diameters or mark your wheel with tape at the 380mm dia/190mm radius.
To check steering play:
Make sure the road wheels are on the ground and pointing straight ahead.
Lightly turn the steering wheel left and right as far as possible without moving the road wheels.
Check the amount of free play at the rim of the steering wheel.
If power steering is fitted, the engine must be running.
Steering wheel free play should not be more than:
13mm for rack and pinion steering, or 48mm if there are several joints between the steering wheel and the rack
75mm for non-rack and pinion
These limits are for a standard 380mm diameter steering wheel. The limits should be adjusted up or down accordingly with larger or smaller diameter steering wheels.
Play due to wear or maladjustment must not be confused with apparent play due to the construction of the mechanism, such as caused by the deflection of flexible joints or spring compression in external power steering systems.